|OUTFLOW [NON-REFLECTING] [ZONE] range1[,range2[, ... rangen]]|
This keyword imposes a non-reflecting, subsonic outflow boundary condition at outflow boundaries in structured zones. Acoustic disturbances reaching the boundary are essentially eliminated. It is actually implemented using the Paynter compressor face model, but with the response coefficients alpha and beta set to zero [Slater, J. W., and Paynter, G. C. (2000) "Implementation of a Compressor Face Boundary Condition Based on Small Disturbances", ASME Paper 2000-GT-0005].
In the zone specification, the range parameter(s) must be one of the following forms:
|zonenum||Selects zone zonenum|
|begzone:endzone||Selects all zones from begzone to endzone|
|ALL||Selects all zones|
This boundary condition is intended to be used for time-accurate flows with a CFL number less than one; however, it may be applicable in certain cases for steady-state simulations.
See Also: COMPRESSOR FACE PAYNTER, TEST 123